Open D minor Tuning on 6-string guitar
Open D minor tuning is D2 A2 D3 F3 A3 D4, written DADFAD. Open D with the 3rd string lowered one more semitone, from F#3 to F3, which flattens the third of the chord.
| String | Note | Frequency (Hz) | MIDI |
|---|---|---|---|
| 6th (lowest) | D2 | 73.42 | 38 |
| 5th | A2 | 110.00 | 45 |
| 4th | D3 | 146.83 | 50 |
| 3rd | F3 | 174.61 | 53 |
| 2nd | A3 | 220.00 | 57 |
| 1st (highest) | D4 | 293.66 | 62 |
Every frequency is computed from the MIDI number, not typed in. Each one links to its own reference page.
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Why guitarists use Open D minor tuning
Also written as D minor or Dm tuning. The open chord is minor, so a barred finger anywhere on the neck gives a minor chord instead of a major one, and the tuning suits modal, drone-heavy playing where the third rarely changes.
Where you will hear it: folk, fingerstyle, modal and drone playing. That list is deliberately limited to genres and playing traditions. Attributing a tuning to specific songs or players is the kind of claim that needs a source, and this page does not make claims it cannot back up.
Open D minor compared with standard EADGBE tuning
This is the table that tells you how far to turn each peg, in semitones and in hertz. A negative semitone value means the string goes down.
| String | Standard | Standard (Hz) | Open D minor | Open D minor (Hz) | Change |
|---|---|---|---|---|---|
| 6th (lowest) | E2 | 82.41 | D2 | 73.42 | -2 semitones (-8.99 Hz) |
| 5th | A2 | 110.00 | A2 | 110.00 | unchanged |
| 4th | D3 | 146.83 | D3 | 146.83 | unchanged |
| 3rd | G3 | 196.00 | F3 | 174.61 | -2 semitones (-21.38 Hz) |
| 2nd | B3 | 246.94 | A3 | 220.00 | -2 semitones (-26.94 Hz) |
| 1st (highest) | E4 | 329.63 | D4 | 293.66 | -2 semitones (-35.96 Hz) |
Notice that equal semitone steps are not equal hertz steps: the same whole step is worth about 9 Hz down at the bottom string and far more at the top. That is why tuners report cents, which are proportional, rather than hertz.
How to tune to Open D minor, string by string
- Play the 6th (lowest) open and adjust until the tuner reads D2 at 73.42 Hz. Aim to land inside five cents.
- Play the 5th open and adjust until the tuner reads A2 at 110.00 Hz. Aim to land inside five cents.
- Play the 4th open and adjust until the tuner reads D3 at 146.83 Hz. Aim to land inside five cents.
- Play the 3rd open and adjust until the tuner reads F3 at 174.61 Hz. Aim to land inside five cents.
- Play the 2nd open and adjust until the tuner reads A3 at 220.00 Hz. Aim to land inside five cents.
- Play the 1st (highest) open and adjust until the tuner reads D4 at 293.66 Hz. Aim to land inside five cents.
Retune in two passes. Changing the tension on one string changes the pull on the neck, so the strings you set first will have drifted slightly by the time you finish the last one. That effect is larger the further the tuning sits from standard, so a tuning that moves four or more strings almost always needs a third pass.
Frequently asked questions
What notes is Open D minor tuning on a 6-string guitar?
Open D minor is D2, A2, D3, F3, A3, D4, written DADFAD. Open D with the 3rd string lowered one more semitone, from F#3 to F3, which flattens the third of the chord.
What are the frequencies of Open D minor tuning?
D2 is 73.42 Hz, A2 is 110.00 Hz, D3 is 146.83 Hz, F3 is 174.61 Hz, A3 is 220.00 Hz, D4 is 293.66 Hz, all in twelve tone equal temperament with A4 at 440 Hz.
How many strings change compared to standard tuning?
4 of 6. the 6th (lowest) goes from E2 to D2 (down 2 semitones), the 3rd goes from G3 to F3 (down 2 semitones), the 2nd goes from B3 to A3 (down 2 semitones), the 1st (highest) goes from E4 to D4 (down 2 semitones).
What is the lowest note in Open D minor tuning?
D2 at 73.42 Hz, MIDI note 38. Low notes take longer for a pitch detector to lock onto, so play the string firmly and let it ring before trusting the cents reading.
Other 6-string guitar tunings
More tuning references
Frequencies on this page are computed at build time from twelve tone equal temperament with A4 = 440 Hz, using the twelfth root of two (about 1.059463) per semitone. Nothing is typed in by hand. See the full method and sources. Maintained by FusionStudios. Last reviewed: .